Abstract：
BACKGROUND INFORMATION:In eukaryotic cells, autophagy is considered a lysosomal catabolic process which participates in the degradation of intracellular components in a vacuolar structure termed autolysosome. This pathway plays a significant role in the erythropoiesis process, contributing to the clearance of some organelles (such as mitochondria) that are not necessary in the mature red blood cells. Nevertheless, the role of autophagy in erythrocyte maturation has not been fully established. RESULTS:Here, we have demonstrated that hemin (a physiological erythroid maturation stimulator) is able to induce the expression of critical autophagic genes (i.e., Map1a1b (LC3), Beclin-1 gen, Atg5) in an erythroleukemia cell type. We have also shown that hemin increased the size of autophagic vacuoles which were labelled with LC3 and the degradative lysosomal marker dye quenched-bovine serum albumin. In addition, we have determined by Western blot a rise in the lipidated form of the autophagic protein LC3 (i.e., LC3-II) upon hemin treatment. Moreover, we provide evidence that hemin induces mitochondrial membrane depolarisation and that mitochondria sequestration by autophagy requires the active form of the NIX protein. CONCLUSIONS:We have found that the physiological erythroid maturation stimulator hemin is able to induce mitophagy in K562 cells, and that the autophagy adaptor NIX is necessary for mitophagy progression. K562 cells have been used as a relevant model to determine the possible therapeutic role of new differentiating compounds. SIGNIFICANCE:It has been proposed that autophagy induction is a feasible new therapeutic key in fighting cancer. Our results suggest that hemin is favoring erythroid maturation by inducing an autophagic response in K562 cells, being a possible therapeutic candidate that may help in the chronic myelogenous leukemia (CML) treatment.
journal_name
Biol Celljournal_title
Biology of the cellauthors
Fader CM,Salassa BN,Grosso RA,Vergara AN,Colombo MIdoi
10.1111/boc.201500058subject
Has Abstractpub_date
2016-04-01 00:00:00pages
77-95issue
4eissn
0248-4900issn
1768-322Xjournal_volume
108pub_type
杂志文章abstract：:Image cytometry was applied to study the intracellular localization of autofluorescence and the influence of an oxidative stress on this emission. K562 erythroleukemia cancer cells were analyzed with a microspectrofluorometer, coupled with a Argon laser (Ar+) (363 nm). From each cell, 15 x 15 emission spectra were rec...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1016/s0248-4900(01)01135-2
更新日期：2001-11-01 00:00:00
abstract：:SaOS-2 cell line presents osteoblastic characteristics which can be modulated by specific agonists involving also phosphoinositide breakdown. In order to determine whether SaOS-2 cells display a phosphoinositide signalling system not only at the cytosol-cell membrane level but also, as recently reported for other cell...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1016/0248-4900(93)90143-3
更新日期：1993-01-01 00:00:00
abstract：:Changes in the organization of centrosomes in mouse splenic T lymphocytes stimulated by concanavalin A (con A) were examined by electron microscopy of serial sections. In both resting and stimulated lymphocytes the single centrosome consists of a pair of centrioles, satellite bodies, and pericentriolar material. In re...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1111/j.1768-322x.1985.tb00332.x
更新日期：1984-01-01 00:00:00
abstract：BACKGROUND INFORMATION:The ribonucleases (RNases) constitute a heterogeneous group of enzymes, which exert diverse and specific biological functions. Several RNases have been shown to control gene expression and cell differentiation. RNASET2, a novel member of the Rh/T2/S family of RNases, exerts micro-environmental co...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1111/boc.201100092
更新日期：2012-01-01 00:00:00
abstract：:Previous experiments have revealed a relatively weak electrostatic binding capacity of in vitro reconstituted intermediate filaments (IFs) as well as of natural IFs of whole cell mount preparations for purified ribosomal particles of mammalian origin. In order to demonstrate that such associations also occur in vivo, ...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：
更新日期：1998-07-01 00:00:00
abstract：:The lateral line of the zebrafish has many of the advantages that made the sensory organs of Drosophila a very productive model system: 1) it comprises a set of discrete sense organs (neuromasts) arranged in a defined, species-specific pattern, such that each organ can be individually recognized; 2) the neuromasts are...
journal_title：Biology of the cell
pub_type： 杂志文章,评审
doi：10.1016/j.biolcel.2003.10.005
更新日期：2003-12-01 00:00:00
abstract：:Structured mRNA elements called riboswitches control gene expression by binding to small metabolites. Over a dozen riboswitch classes have been characterized that target a broad range of molecules and vary widely in size and secondary structure. Four of the known riboswitch classes recognize purines or modified purine...
journal_title：Biology of the cell
pub_type： 杂志文章,评审
doi：10.1042/BC20070088
更新日期：2008-01-01 00:00:00
abstract：:In the present study, we describe the structural and cytological changes observed in staggerer mutant olfactory bulbs, as compared to normal mice. On the basis of photonic and ultrastructural observations we tried to define the alterations induced by the mutation: i.e. a reduction of bulb size, a reduction in the volu...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：
更新日期：1999-01-01 00:00:00
abstract：BACKGROUND INFORMATION:Death receptors (DRs) induce intracellular signalling upon engagement of their cognate ligands, leading to apoptosis, cell survival or pro-inflammatory responses. In mammals, DR signalling is mediated by the recruitment of several DD (death domain)-containing molecules, such as FADD (Fas-associat...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1042/BC20050091
更新日期：2006-08-01 00:00:00
abstract：:In eukaryotes transcription and translation takes place in two different compartments separated by the nuclear envelope. Nuclear translation has been reported in several publications, however, all these published results have been criticized, particularly with respect to cytoplasmic contamination of the nuclei. We hav...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1016/s0248-4900(03)00059-5
更新日期：2003-07-01 00:00:00
abstract：:In 2001, with-no-lysine (WNK) kinases were identified as the genes responsible for the human hereditary hypertensive disease pseudohypoaldosteronism type II (PHAII). It took a further 6 years to clarify that WNK kinases participate in a signaling cascade with oxidative stress-responsive gene 1 (OSR1), Ste20-related pr...
journal_title：Biology of the cell
pub_type： 杂志文章,评审
doi：10.1111/boc.201300069
更新日期：2014-02-01 00:00:00
abstract：BACKGROUND INFORMATION:Caspases are cysteine proteases that mediate apoptosis (programmed cell death) initiation and execution. Apoptosis is a conserved mechanism shared by all metazoans, although its physiological function and complexity show considerable taxon-dependent variations. To gain insight into the caspase re...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1042/BC20050018
更新日期：2005-11-01 00:00:00
abstract：:Detergent extraction of human blood platelets pre-treated with Taxol to stabilize microtubules allows isolation of marginal band (MB) cytoskeletons. We studied MB cytoskeleton structure using dark-field light microscopy and negative stain electron microscopy (EM). Dark-field illumination clearly demonstrated the "hoop...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1016/0248-4900(88)90002-0
更新日期：1988-01-01 00:00:00
abstract：:Revision of the reference map of the polytene chromosomes of Drosophila subobscura was started by means of the electron microscope. We present a map of regions 70B to 72D of the E chromosome obtained from squashed and thin-sectioned salivary glands. It was observed that the total number of bands in divisions 70B to 72...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1111/j.1768-322x.1988.tb00750.x
更新日期：1988-01-01 00:00:00
abstract：BACKGROUND INFORMATION:The mitogen-inducible gene-6 (Mig-6) is a non-kinase scaffolding adaptor protein. It has been shown that Mig-6 may play important roles in regulating stress response, maintaining homeostasis and functioning as a tumour suppressor. In this study, we investigated the role of Mig-6 in cellular senes...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1111/boc.201200052
更新日期：2013-10-01 00:00:00
abstract：:A monoclonal antibody of the IgG2a subclass was isolated from the supernate of a hybridoma line obtained with splenocytes from a mouse immunized with a crude nucleolar fraction of human Namalwa cells. This antibody identifies a single nuclear polypeptide antigen characterized by: (a) presence in proliferating human ce...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1111/j.1768-322x.1987.tb00539.x
更新日期：1987-01-01 00:00:00
abstract：BACKGROUND INFORMATION:Caspase-dependent and -independent death mechanisms are involved in apoptosis in a variety of human carcinoma cells treated with antineoplastic compounds. Our laboratory has reported that p53 is a key contributor of mitochondrial apoptosis in cervical carcinoma cells after staurosporine exposure....
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1042/BC20080164
更新日期：2009-06-04 00:00:00
abstract：:LDs (lipid droplets) have long been considered as inert particles used by the cells to store fatty acids and sterols as esterified non-toxic lipid species (i.e. triacylglycerols and steryl esters). However, accumulating evidence suggests that LDs behave as a dynamic compartment, which is involved in the regulation of ...
journal_title：Biology of the cell
pub_type： 杂志文章,评审
doi：10.1042/BC20100144
更新日期：2011-06-01 00:00:00
abstract：:Cell nuclei may contain significant quantities of the metals Fe, Ni, Cu, Zn, since they are present in the nucleo-enzymes and/or nucleic acids. These metals have been detected by X-ray microanalysis in situ in dinoflagellates (Kearns et al). Aluminum was only detected in cell nuclei in cases of natural or provoked int...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1111/j.1768-322x.1987.tb00577.x
更新日期：1987-01-01 00:00:00
abstract：:We studied the behaviour in interphase and mitotic human cells of a 125 kDa (pI 6.5) antigen, associated with the nuclear matrix and detected in proliferating cells. Indirect immunofluorescence with a specific monoclonal antibody reveals that during interphase in WISH and Namalwa cells, as well as phytohaemagglutinin-...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：
更新日期：1988-01-01 00:00:00
abstract：:The isolation, characterization, and expression of a novel cDNA encoding a Trypanosoma cruzi polypeptide (TcAc2), homologous to various small stress proteins and glutathione S-transferases, are described. The deduced amino-acid sequence revealed two domains sharing 27% identity and an additional 27% similarity to each...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1016/0248-4900(94)90011-6
更新日期：1994-01-01 00:00:00
abstract：:Photoperiodic control of several biological rhythms is exerted through the inhibitory effect of light on melatonin synthesis in the pineal organ. Hydroxyindole-O-methyltransferase (HIO-MT), the last acting-enzyme in melatonin biosynthesis, constitutes a specific marker of melatoninergic cells. In the present study, an...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1016/0248-4900(88)90098-6
更新日期：1988-01-01 00:00:00
abstract：:The occurrence of the tubulin post-translational modification, polyglycylation, in stable microtubular structures was investigated during morphogenesis in two ciliates, Paramecium and Frontonia atra, belonging to the Epiplasmata group. This analysis was carried out by means of immunofluorescence and post-embedding imm...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1016/s0248-4900(00)01107-2
更新日期：2000-12-01 00:00:00
abstract：:Flow DNA analysis was performed on samples from 71 surgically removed lung cancers and from 145 patients undergoing bronchoscopy. Abnormal DNA stem lines, characterized by their DNA index (DI), were frequently observed in operated lung carcinomas (87%). Two or three abnormal DNA stem lines were discovered simultaneous...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1111/j.1768-322x.1986.tb00494.x
更新日期：1986-01-01 00:00:00
abstract：:Arabinoxylans were localised by immunocytochemistry using polyclonal antibodies in the cell walls of the apical internode of maize after degradation in the rumen. In order to understand the significance of arabinoxylan in digestibility property, two lines of maize differing in digestibility were used. Wide variations ...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：10.1111/j.1768-322x.1996.tb00988.x
更新日期：1996-01-01 00:00:00
abstract：:During a historical research, we realized that René Couteaux (1909-1999) was the first histologist who stained the postsynaptic structure of the neuromuscular junction. By means of Janus Green B dye, he revealed the membranous 'subneural apparatus' related to the 'synaptic gutter'. Hence, he justified the use of the p...
journal_title：Biology of the cell
pub_type： 传,历史文章,杂志文章
doi：10.1042/BC20050036
更新日期：2006-08-01 00:00:00
abstract：:Detergent permeabilized Euplotes eurystomus (a fresh water hypotrichous ciliate) was reacted with monoclonal and polyclonal antibodies specific for either detyrosinated or tyrosinated alpha-tubulin (Glu- or Tyr-tubulin). The isolated cytoskeleton-nuclear complex was examined by Western immunoblotting and by immunofluo...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：
更新日期：1989-01-01 00:00:00
abstract：:ERM (ezrin/radixin/moesin) proteins, concentrated in actin rich cell-surface structures, cross-link actin filaments with the plasma membrane. They are involved in the formation of microvilli, cell-cell adhesion, maintenance of cell shape, cell motility and membrane trafficking. Recent analyses reveal that they are not...
journal_title：Biology of the cell
pub_type： 杂志文章,评审
doi：10.1016/s0248-4900(00)01078-9
更新日期：2000-08-01 00:00:00
abstract：:Genome replication and assembly of viruses often takes place in specific intracellular compartments where viral components concentrate, thereby increasing the efficiency of the processes. For a number of viruses the formation of 'factories' has been described, which consist of perinuclear or cytoplasmic foci that most...
journal_title：Biology of the cell
pub_type： 杂志文章,评审
doi：10.1042/BC20040058
更新日期：2005-02-01 00:00:00
abstract：:Previous studies suggest that oligodeoxynucleotide (ODN) cellular uptake is cell cycle-dependent which may have important implications in cancer cell targeting. To further our understanding of ODN transport and activity, this study examines the relationships between the cell cycle, ODN cellular uptake, intracellular t...
journal_title：Biology of the cell
pub_type： 杂志文章
doi：
更新日期：1997-07-01 00:00:00
